Adjustable mold for reinforced concrete constructions.



PATENTED OGT.18,'1904.

AQBBNTLEY. ADJUSTABLE MOLD FOR REINFORGED'GONGRETB CONSTRUCTION.

APPLICATION FILED AUG. 4, 1904.

2 SHEETS-SHEET 2- N0 MODEL.

INVENTOR.

WITNESSES UNITED STATES Patented October 18, 1904.

, PATENT OEEIcr-t.

ADJUSTABLE MOLD FOR REINFORCED CONCRETE CONSTRUCTIONS.

SPECIFICATION forming part of Letters Patent No. 772,398, dated October18, 1904.

Application filed August 4, 1904. serial No. 219,412. (No model.)

To all whom it may concern:

Be it known that I, ANDERTONVBENTLEY, a citizen of the United States,and a resident of Toledo, in the county of Lucas and State of Ohio, haveinvented certain new and useful Improvements in Adjustable Molds forReinforced Concrete Constructions; and I do hereby declare the followingto bea full, clear, and exact description of the invention, such as willenable others skilled in the art to-which it appertains to make and usethe same, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form a part of thisspecification.

My invention relates especially to improvements in the molds used inreinforcing concrete construction for the formation and uniting ofbeams, columns, and brackets.

The object of my invention is to provide a mold for the formation ofconcrete structures, whereby the connected beams, columns, brackets,&c., of such structures may be formed into a single integral or unitedmass, thus avoiding the weak points incident to structures of this classoccasioned by joints and cracks at the connections of such columns,beams, and brackets.

Further objects of my invention are to provide a mold of this class thatis simple and cheap in its construction, easily adjustable for theformation of columns and beams of different sizes and lengths, readilyknocked down after a formed beam or column has hardened,

and capable of repeated use for the same classof Work.

The invention is fully described in the following specification andshown in the accompanying drawings, in which Figure 1 is a verticalelevation of a portion of a column-mold and associated beam-moldswithoneof the beam-molds in longitudinal vertical section and thecolumn-mold partly broken away. Fig. 2 is a top plan view of a squarecolumn and diverging beams. Fig. 3 is a similar view of an octagoncolumn and diverging beams. Fig. 4 is a longitudinal vertical section ofa portion of a beam-mold; and Fig. 5 is a cross-section of a beam, takenon the dotted lines 00 m in Figs. 1 and 3 and looking in the directionof the arrow.

Referring to the drawings, A represents a column-mold, which may be ofsquare, octagon, or other desired shape, and B the connectingbeam-molds, which are shown in the drawings as radiating from threesides of the column-mold. The columns A when in square form comprise thecorner or right-angled pieces a, of wood or other suitable material,which are of sufficient strength to withstand the weight of the concretemixture when poured therein. The inner edges of the anglepieces aarerabbeted, as shown at b, for receiving the ends of thetransversely-positioned boards or strips 0, which latter are nailed orotherwise suitably secured thereto and complete the square. These boardsare continued to the top of the column on the sides where there are noradiating beams and on the sides where there are such beams to the pointof connection thereof with the side of the column. The corner-pieces aand connecting boards or strips 0 of a column are retained together inrigid position by means of the angle-irons d and connectinglocking-strips c, which latter are provided with a series ofbolt-receiving apertures e to enable the same to be adjusted to the sizeof the perimeter of a column.

The beam-molds B are composed of three separable parts that is, the twoside pieces f f and the bottom or floor piece 9, which connects the twoside pieces when in set-up position. The side pieces f are provided witha plurality of transverse strips h, which secure together the severalboards composing a side piece f and also act as bracing-strips for themolds when in set-up position. These strips /L project below the planeof the bottom g of a mold and have their lower ends held in rigid spacedposition with relation to a transversely alining strip ofthe oppositeside piece by means of the inserted braces i, which bottom g to a depthequal to that of the strips against the board 0 by means of the angledhas shown in Figs. 1 and 5, or terminate braccsp, which are retainedin'position by on a plane with said bottom, as shown in Fig. 4. Thereason for bracing the sides f of a mold in the manner described is tomake the upper part of the sides f rigid to avoid expansion as the heavyconcrete is deposited therein and at the same time to form a mold havingthe trough thereof unimpeded by bolts or lateral braces. The bottom g ofa mold may be supported on the transverse bolts f, as shown, or oncleats formed on the sides f for that purpose.

hen a beam-mold B is connected to a column-mold A, the end of the formeris placed upon and supported by a transverse strip 7.1, which has aportion embedded in the contiguous side of the oorner-picces a. The endsof the side pieces f of a beam-mold are continued to a plane with theinner edges of the connecting-boards of the adjacent cornerpieces (4 bymeans of extension-strips I, which are retained thereto in any suitablemanner, and the space between said strips and the edge of the adjacentcorner-board a filled by the insertion of a rabbeted piece 977., whichis secured to the side of the contiguous extension-strip.

1t frequently happens that a beam-mold is not of sufficient length tospan the distance between the two columns, in which case an extension Zof a length equal to the intervening space is employed. As it isnecessary in such cases to provide a support for the end of thebeam-mold which terminates a distance from the column, I employ metalstrips 11., which are secured to the lower portion of the mold and passaround the inner edges of the extension-strips Z at an angle adapted tobest support the load. I

- In order to prevent an inward movement of a beam-mold with respect toa connected column-mold previous to the depositing of concrete withinthe latter, a longitudinal strip 122/ is secured to either side of thebeam-mold in alining position with the edge of the associatedcorner-piece a of the column-mold and a wedge Z driven between the endof the strip on and the edge of the corner-piece a, as shown in Figs. 1and 2. It will thus be seen that the interlocking of the rabbetedportions of the corner-pieces a and the insertion-strips m prevents anoutward movement of the beam-mold, While the strips m and interposedwedges Z prevent aninward movement thereof.

Should it be desired to form a concrete bracket integral with the columnand connecting-beam for aiding in the support of the beam, the end ofthe bottom g of a beam-mold is cut off a desired distance from theconnecting-column and a board 0 inserted at the desired slant (usuallyforty-five degrees) between the severed end of the bottom and thesupporting-strip K The sides f are retained means of a bolt j, whichpasses under the bottom board 9 at a point'adjacent to the slantingpiece 0, the said braces also serving to prevent the spreading of theupper and lower portions of the sides f, as shown in Figs. 1 and 2, thelateral pressure of the load within the slanted portion beingneutralized by a similar pressure thereof on the sides of the mold abovethe retaining-bolt.

The octagon columns are substantially the same in construction as thesquare ones except that a straight piece a is employed in place of theright-angled pieces a. The edges of the pieces a are either rabbeted toreceive the transverse strips 0 or the space is made narrow, as desired,by the use of insertion- .strips, Which are in turn rabbeted to receivethe filling-boards, as shown. The adjustingbands 1 (shown in Fig. 3) aremade to accommodate themselves to the octagon shape of the column andmay either be made of wood or metal.

It will be apparent from the above description that the beam and columnmolds are constructed so that they can be extended in length or enlargedin size, as desired.

In practice the boards 0 of a column are built up as the filling-inprocess progresses, thus enabling the work to be inspected as theconcrete is deposited within a mold to ascertain whether or not it isbeing properly packed. hen a beam and column have been completed and theconcrete thoroughly dried, the beam-molds are easily removed by knockingthe supporting-strips h from the columns and the braces 2' out frombetween the lower ends of the strips h after first loosening the bolts7', thereby allowing the sides f and bottom 9 to free themselves anddrop down from a beam. The column-molds are removed by loosening thesurrounding tightening-bands, thereby allowing the corner-pieces to dropaway from the column and permitting the boards 0 to be removed.

It is obvious that such changes in the shape, form, proportions, andminor details of construction of the parts as fairly fall within thescope of my invention may be made without departing from the spirit orsacrificing any of the advantages thereof.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A beam-mold comprising separable side and bottom sections, aplurality of strips secured to the side sections and projecting belowthe bottom section, braces between the ends of oppositely-disposedstrips, and means immediately below and forming a rest for said bottomadapted to tighten said strips for the purpose described.

2. A mold for concrete construction, comprising a column-mold havingvertical cornerpieces and connecting-strips,tightening-bands WNW-surrounding said column-mold, and a beammold removably attached to andcommunicating with the interior of said column-mold.

3. A mold of the class described, comprising vertical corner members,removable strips connecting said members to form a columnmold, means forlooking the column-mold against expansion, a trough communicating with aportion of the column-mold between the vertical members thereof, saidtrough comprising separable side and bottom sections, strips secured tothe side sections and projecting below the plane of the bottom section,bolts connecting the opposite strips,and braces interposed between theprojecting ends of the connected strips for the purpose described.

4. A mold for concrete construction, comprising vertical corner membershaving rabbeted edges, boards connecting said rabbeted edges to form acolumn, a horizontal mold, strips secured to the sides of said mold inalining position and projecting below the same, braces separating saidstrips, means for contracting said strips, and means for removablyconnecting the end of said horizontal mold to a column between twocorner-pieces thereof.

5. In combination, a column-mold comprising vertical corner members,connectingstrips, and tightening-bands, a beam-mold removably connectedto the column-mold and communicating with the interior thereof andcomprising side pieces, a bottom piece terminating at its connecting endin a downward slant, and means for preventing an expansion of said sidemembers when concrete is poured therein.

6. In combination, a column-mold comprising Vertical corner-pieces,strips connecting the contiguous edges of said members and adjustablebands for surrounding said parts, beam-molds, extension means forconnecting the ends of said beam-molds to the sides of said column-moldin communicating position, a slanting bottom in the beam-mold at thejuncture-point of the latter with a columnmold for the purposedescribed.

7. A mold for concrete construction, comprising a column-mold and abeam-mold having removable connection with said columnmold, saidbeam-mold comprising separable side and bottom pieces, means forretaining said parts together and preventing expansion of the sides, andmeans for locking said beammold against independent longitudinalmovement with respect to the column-mold.

8. In a mold of the class described a vertical receptacle, one or morehorizontal receptacles communicating with the interior of said verticalreceptacle, means for removably connecting said receptacles, and meansfor preventing independent movement thereof, substantially as described.

In testimony whereof I have hereunto signed my name to thisspecification in the presence of two subscribing witnesses.

ANDERTON BENTLEY.

Witnesses:

MYER GVELLERD, C. W. OWEN.

